20 U.S.C. § 104: Annual reports by trustees

The trustees of said American Printing House for the Blind shall annually make to the Secretary of Education a report of the items of their expenditure of the appropriation aforesaid during the year preceding their report, and shall annually furnish him with a voucher from each public or private nonprofit institution for the education of the blind, showing that the amount of books and tangible apparatus due has been received.